/**
 * 国密SM4加密算法
 * 徐一杰
 * 2022/10/18
 *
 * 调用方法：
 * import {SM4Util} from '@/utils/sm4';
 * var sm4 = new SM4Util();
 * 不使用自定义 secretKey，一般用于前端自行加解密,如果是前端加密后端解密，则需要自定义secretKey，前后端一致才能正确解密
 * sm4.encryptDefault_ECB('123456');
 * sm4.decryptDefault_ECB('123456');
 * sm4.encryptCustom_ECB('123456', 'asdfghjklmnbvcx,');
 * sm4.decryptCustom_ECB('123456', 'asdfghjklmnbvcx,');
 *
 * CBC 加密模式（更加安全），需要两个密钥
 * sm4.encryptDefault_CBC('123456');
 * sm4.decryptDefault_CBC('123456');
 * 同样可以自定义 secretKey 和 iv，需要两个密钥前后端都一致
 * sm4.encryptCustom_CBC('123456', 'asdfghjklmnbvcx,', 'mnbvcxzpoiuytre1');
 * sm4.decryptCustom_CBC('123456', 'asdfghjklmnbvcx,', 'mnbvcxzpoiuytre1');
 */
import base64js from 'base64-js'
function SM4_Context() {
	this.mode = 1
	this.isPadding = true
	this.sk = new Array(32)
}

function SM4() {
	this.SM4_ENCRYPT = 1
	this.SM4_DECRYPT = 0

	const SboxTable = [
		0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, 0x2b, 0x67, 0x9a,
		0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef,
		0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80,
		0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19,
		0xe6, 0x85, 0x4f, 0xa8, 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d,
		0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, 0xd4, 0x00,
		0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, 0xea, 0xbf, 0x8a, 0xd2, 0x40,
		0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
		0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23,
		0xab, 0x0d, 0x53, 0x4e, 0x6f, 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c,
		0x5b, 0x51, 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, 0x0a,
		0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, 0x89, 0x69, 0x97, 0x4a,
		0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d,
		0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
	]

	const FK = [0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc]

	const CK = [
		0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, 0xe0e7eef5,
		0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, 0xc0c7ced5, 0xdce3eaf1,
		0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed,
		0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
	]

	this.GET_ULONG_BE = function (b, i) {
		return ((b[i] & 0xff) << 24) | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8) | (b[i + 3] & 0xff & 0xffffffff)
	}

	this.PUT_ULONG_BE = function (n, b, i) {
		var t1 = 0xff & (n >> 24)
		var t2 = 0xff & (n >> 16)
		var t3 = 0xff & (n >> 8)
		var t4 = 0xff & n
		b[i] = t1 > 128 ? t1 - 256 : t1
		b[i + 1] = t2 > 128 ? t2 - 256 : t2
		b[i + 2] = t3 > 128 ? t3 - 256 : t3
		b[i + 3] = t4 > 128 ? t4 - 256 : t4
	}

	this.SHL = function (x, n) {
		return (x & 0xffffffff) << n
	}

	this.ROTL = function (x, n) {
		// const s = this.SHL(x, n);
		// const ss = x >> (32 - n);
		return this.SHL(x, n) | (x >> (32 - n))
	}

	this.sm4Lt = function (ka) {
		let bb
		let c
		const a = new Array(4)
		const b = new Array(4)
		this.PUT_ULONG_BE(ka, a, 0)
		b[0] = this.sm4Sbox(a[0])
		b[1] = this.sm4Sbox(a[1])
		b[2] = this.sm4Sbox(a[2])
		b[3] = this.sm4Sbox(a[3])
		bb = this.GET_ULONG_BE(b, 0)
		c = bb ^ this.ROTL(bb, 2) ^ this.ROTL(bb, 10) ^ this.ROTL(bb, 18) ^ this.ROTL(bb, 24)
		return c
	}

	this.sm4F = function (x0, x1, x2, x3, rk) {
		return x0 ^ this.sm4Lt(x1 ^ x2 ^ x3 ^ rk)
	}

	this.sm4CalciRK = function (ka) {
		let bb
		let rk
		const a = new Array(4)
		const b = new Array(4)
		this.PUT_ULONG_BE(ka, a, 0)
		b[0] = this.sm4Sbox(a[0])
		b[1] = this.sm4Sbox(a[1])
		b[2] = this.sm4Sbox(a[2])
		b[3] = this.sm4Sbox(a[3])
		bb = this.GET_ULONG_BE(b, 0)
		rk = bb ^ this.ROTL(bb, 13) ^ this.ROTL(bb, 23)
		return rk
	}

	this.sm4Sbox = function (inch) {
		const i = inch & 0xff
		const retVal = SboxTable[i]
		return retVal > 128 ? retVal - 256 : retVal
	}

	this.sm4_setkey_enc = function (ctx, key) {
		if (ctx == null) {
			alert('ctx is null!')
			return false
		}
		if (key == null || key.length !== 16) {
			alert('key error!')
			return false
		}
		ctx.mode = this.SM4_ENCRYPT
		this.sm4_setkey(ctx.sk, key)
	}

	//生成解密密钥
	this.sm4_setkey_dec = function (ctx, key) {
		if (ctx == null) {
			Error('ctx is null!')
		}

		if (key == null || key.length !== 16) {
			Error('2key error!')
		}

		// var i = 0;
		ctx.mode = 0
		this.sm4_setkey(ctx.sk, key)
		ctx.sk = ctx.sk.reverse()
	}

	this.sm4_setkey = function (SK, key) {
		const MK = new Array(4)
		const k = new Array(36)
		// var i = 0;
		MK[0] = this.GET_ULONG_BE(key, 0)
		MK[1] = this.GET_ULONG_BE(key, 4)
		MK[2] = this.GET_ULONG_BE(key, 8)
		MK[3] = this.GET_ULONG_BE(key, 12)
		k[0] = MK[0] ^ FK[0]
		k[1] = MK[1] ^ FK[1]
		k[2] = MK[2] ^ FK[2]
		k[3] = MK[3] ^ FK[3]
		for (let i = 0; i < 32; i++) {
			k[i + 4] = k[i] ^ this.sm4CalciRK(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ CK[i])
			SK[i] = k[i + 4]
		}
	}
	this.padding = function (input, mode) {
		let p
		if (input == null) {
			return null
		}
		let ret = null
		if (mode === this.SM4_ENCRYPT) {
			p = parseInt(16 - (input.length % 16))
			ret = input.slice(0)
			for (let i = 0; i < p; i++) {
				ret[input.length + i] = p
			}
		} else {
			p = input[input.length - 1]
			ret = input.slice(0, input.length - p)
		}
		return ret
	}
	this.sm4_one_round = function (sk, input, output) {
		let i = 0
		const ulbuf = new Array(36)
		ulbuf[0] = this.GET_ULONG_BE(input, 0)
		ulbuf[1] = this.GET_ULONG_BE(input, 4)
		ulbuf[2] = this.GET_ULONG_BE(input, 8)
		ulbuf[3] = this.GET_ULONG_BE(input, 12)
		while (i < 32) {
			ulbuf[i + 4] = this.sm4F(ulbuf[i], ulbuf[i + 1], ulbuf[i + 2], ulbuf[i + 3], sk[i])
			i++
		}
		this.PUT_ULONG_BE(ulbuf[35], output, 0)
		this.PUT_ULONG_BE(ulbuf[34], output, 4)
		this.PUT_ULONG_BE(ulbuf[33], output, 8)
		this.PUT_ULONG_BE(ulbuf[32], output, 12)
	}

	this.sm4_crypt_ecb = function (ctx, input) {
		if (input == null) {
			alert('input is null!')
		}
		if (ctx.isPadding && ctx.mode === this.SM4_ENCRYPT) {
			input = this.padding(input, this.SM4_ENCRYPT)
		}

		let i = 0
		let length = input.length
		let bous = []
		for (; length > 0; length -= 16) {
			var out = new Array(16)
			var ins = input.slice(i * 16, 16 * (i + 1))
			this.sm4_one_round(ctx.sk, ins, out)
			bous = bous.concat(out)
			i++
		}

		let output = bous
		if (ctx.isPadding && ctx.mode === this.SM4_DECRYPT) {
			output = this.padding(output, this.SM4_DECRYPT)
		}
		for (i = 0; i < output.length; i++) {
			if (output[i] < 0) {
				output[i] = output[i] + 256
			}
		}
		return output
	}

	this.sm4_crypt_cbc = function (ctx, iv, input) {
		let out
		let ins
		let out1
		let k
		if (iv == null || iv.length !== 16) {
			alert('iv error!')
		}

		if (input == null) {
			alert('input is null!')
		}

		if (ctx.isPadding && ctx.mode === this.SM4_ENCRYPT) {
			input = this.padding(input, this.SM4_ENCRYPT)
		}

		let i = 0
		let length = input.length
		let bous = []
		if (ctx.mode === this.SM4_ENCRYPT) {
			k = 0
			for (; length > 0; length -= 16) {
				out = new Array(16)
				out1 = new Array(16)
				ins = input.slice(k * 16, 16 * (k + 1))

				for (i = 0; i < 16; i++) {
					out[i] = ins[i] ^ iv[i]
				}
				this.sm4_one_round(ctx.sk, out, out1)
				iv = out1.slice(0, 16)
				bous = bous.concat(out1)
				k++
			}
		} else {
			let temp = []
			k = 0
			for (; length > 0; length -= 16) {
				out = new Array(16)
				out1 = new Array(16)
				ins = input.slice(k * 16, 16 * (k + 1))
				temp = ins.slice(0, 16)
				this.sm4_one_round(ctx.sk, ins, out)
				for (i = 0; i < 16; i++) {
					out1[i] = out[i] ^ iv[i]
				}
				iv = temp.slice(0, 16)
				bous = bous.concat(out1)
				k++
			}
		}

		let output = bous
		if (ctx.isPadding && ctx.mode === this.SM4_DECRYPT) {
			output = this.padding(output, this.SM4_DECRYPT)
		}

		for (i = 0; i < output.length; i++) {
			if (output[i] < 0) {
				output[i] = output[i] + 256
			}
		}
		return output
	}
}

const SM4Util = function () {
	// 和后端secretKey一致才能正确解密，可自定义传入，如果不传，则使用下面的默认secretKey
	this.secretKey = 'GJwsXX_BzW=gJWJW'
	// 当时用CBC模式的时候，除了secretKey，还需要 iv，可自定义传入，如果不传，则使用下面的默认iv
	this.iv = 'ZkR_SiNoSOFT=568'
	this.hexString = false

	// ECB模式加密，默认secretKey
	this.encryptDefault_ECB = function (plainText) {
		try {
			const sm4 = new SM4()
			const ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			const keyBytes = this.stringToByte(this.secretKey)
			sm4.sm4_setkey_enc(ctx, keyBytes)
			const encrypted = sm4.sm4_crypt_ecb(ctx, this.stringToByte(plainText))
			const cipherText = base64js.fromByteArray(encrypted)
			if (cipherText != null && cipherText.trim().length > 0) {
				cipherText.replace(/(\s*|\t|\r|\n)/g, '')
			}
			return cipherText
		} catch (e) {
			console.error(e)
			return null
		}
	}
	// ECB模式加密，自定义secretKey
	this.encryptCustom_ECB = function (plainText, secretKey) {
		try {
			const sm4 = new SM4()
			const ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			const keyBytes = this.stringToByte(secretKey)
			sm4.sm4_setkey_enc(ctx, keyBytes)
			const encrypted = sm4.sm4_crypt_ecb(ctx, this.stringToByte(plainText))
			const cipherText = base64js.fromByteArray(encrypted)
			if (cipherText != null && cipherText.trim().length > 0) {
				cipherText.replace(/(\s*|\t|\r|\n)/g, '')
			}
			return cipherText
		} catch (e) {
			console.error(e)
			return null
		}
	}
	//解密_ECB，默认secretKey
	this.decryptDefault_ECB = function (cipherText) {
		try {
			let sm4 = new SM4()
			let ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			let keyBytes = this.stringToByte(this.secretKey)
			sm4.sm4_setkey_dec(ctx, keyBytes)
			let decrypted = sm4.sm4_crypt_ecb(ctx, base64js.toByteArray(cipherText))
			return this.byteToString(decrypted)
		} catch (e) {
			console.error(e)
			return null
		}
	}
	//解密_ECB，自定义secretKey
	this.decryptCustom_ECB = function (cipherText, secretKey) {
		try {
			let sm4 = new SM4()
			let ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			let keyBytes = this.stringToByte(secretKey)
			sm4.sm4_setkey_dec(ctx, keyBytes)
			let decrypted = sm4.sm4_crypt_ecb(ctx, base64js.toByteArray(cipherText))
			return this.byteToString(decrypted)
		} catch (e) {
			console.error(e)
			return null
		}
	}

	// CBC模式加密，默认 iv 和 secretKey
	this.encryptDefault_CBC = function (plainText) {
		try {
			const sm4 = new SM4()
			const ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT

			const keyBytes = this.stringToByte(this.secretKey)
			const ivBytes = this.stringToByte(this.iv)

			sm4.sm4_setkey_enc(ctx, keyBytes)
			const encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, this.stringToByte(plainText))
			const cipherText = base64js.fromByteArray(encrypted)
			if (cipherText != null && cipherText.trim().length > 0) {
				cipherText.replace(/(\s*|\t|\r|\n)/g, '')
			}
			return cipherText
		} catch (e) {
			console.error(e)
			return null
		}
	}
	// CBC模式加密，自定义 iv 和 secretKey
	this.encryptCustom_CBC = function (plainText, iv, secretKey) {
		try {
			const sm4 = new SM4()
			const ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT

			const keyBytes = this.stringToByte(secretKey)
			const ivBytes = this.stringToByte(iv)

			sm4.sm4_setkey_enc(ctx, keyBytes)
			const encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, this.stringToByte(plainText))
			const cipherText = base64js.fromByteArray(encrypted)
			if (cipherText != null && cipherText.trim().length > 0) {
				cipherText.replace(/(\s*|\t|\r|\n)/g, '')
			}
			return cipherText
		} catch (e) {
			console.error(e)
			return null
		}
	}
	//解密_CBC，默认 iv 和 secretKey
	this.decryptDefault_CBC = function (cipherText) {
		try {
			let sm4 = new SM4()
			let ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			let keyBytes = this.stringToByte(this.secretKey)
			let ivBytes = this.stringToByte(this.iv)
			sm4.sm4_setkey_dec(ctx, keyBytes)
			let decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, base64js.toByteArray(cipherText))
			return this.byteToString(decrypted)
		} catch (e) {
			console.error(e)
			return null
		}
	}
	//解密_CBC，自定义 iv 和 secretKey
	this.decryptCustom_CBC = function (cipherText, iv, secretKey) {
		try {
			let sm4 = new SM4()
			let ctx = new SM4_Context()
			ctx.isPadding = true
			ctx.mode = sm4.SM4_ENCRYPT
			let keyBytes = this.stringToByte(secretKey)
			let ivBytes = this.stringToByte(iv)
			sm4.sm4_setkey_dec(ctx, keyBytes)
			let decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, base64js.toByteArray(cipherText))
			return this.byteToString(decrypted)
		} catch (e) {
			console.error(e)
			return null
		}
	}

	this.stringToByte = function (str) {
		const bytes = []
		let len, c
		len = str.length
		for (let i = 0; i < len; i++) {
			c = str.charCodeAt(i)
			if (c >= 0x010000 && c <= 0x10ffff) {
				bytes.push(((c >> 18) & 0x07) | 0xf0)
				bytes.push(((c >> 12) & 0x3f) | 0x80)
				bytes.push(((c >> 6) & 0x3f) | 0x80)
				bytes.push((c & 0x3f) | 0x80)
			} else if (c >= 0x000800 && c <= 0x00ffff) {
				bytes.push(((c >> 12) & 0x0f) | 0xe0)
				bytes.push(((c >> 6) & 0x3f) | 0x80)
				bytes.push((c & 0x3f) | 0x80)
			} else if (c >= 0x000080 && c <= 0x0007ff) {
				bytes.push(((c >> 6) & 0x1f) | 0xc0)
				bytes.push((c & 0x3f) | 0x80)
			} else {
				bytes.push(c & 0xff)
			}
		}
		return bytes
	}

	this.byteToString = function (arr) {
		if (typeof arr === 'string') {
			return arr
		}
		let str = '',
			_arr = arr
		for (let i = 0; i < _arr.length; i++) {
			const one = _arr[i].toString(2),
				v = one.match(/^1+?(?=0)/)
			if (v && one.length === 8) {
				const bytesLength = v[0].length
				let store = _arr[i].toString(2).slice(7 - bytesLength)
				for (let st = 1; st < bytesLength; st++) {
					store += _arr[st + i].toString(2).slice(2)
				}
				str += String.fromCharCode(parseInt(store, 2))
				i += bytesLength - 1
			} else {
				str += String.fromCharCode(_arr[i])
			}
		}
		return str
	}
}

export { SM4Util }
;(function (r) {
	if (typeof exports === 'object' && typeof module !== 'undefined') {
		module.exports = r()
		module.exports.SM4Util = SM4Util
	} else {
		let define
		if (typeof define === 'function' && define.amd) {
			define([], r)
		} else {
			let e
			if (typeof window !== 'undefined') {
				e = window
			} else {
				if (typeof global !== 'undefined') {
					e = global
				} else {
					if (typeof self !== 'undefined') {
						e = self
					} else {
						e = this
					}
				}
			}
			e.base64js = r()
		}
	}
})(function () {
	return (function r(e, t, n) {
		const f = typeof require == 'function' && require

		function o(i, a) {
			if (!t[i]) {
				if (!e[i]) {
					const u = typeof require == 'function' && require
					if (!a && u) {
						return u(i, !0)
					}
					if (f) {
						return f(i, !0)
					}
					const d = new Error("Cannot find module '" + i + "'")
					throw ((d.code = 'MODULE_NOT_FOUND'), d)
				}
				const c = (t[i] = { exports: {} })
				e[i][0].call(
					c.exports,
					function (r) {
						const t = e[i][1][r]
						return o(t ? t : r)
					},
					c,
					c.exports,
					r,
					e,
					t,
					n
				)
			}
			return t[i].exports
		}

		for (let i = 0; i < n.length; i++) {
			o(n[i])
		}
		return o
	})(
		{
			'/': [
				function (r, e, t) {
					t.byteLength = c
					t.toByteArray = v
					t.fromByteArray = s
					const n = []
					const o = []
					const f = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
					const i = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
					let a = 0,
						u = i.length
					for (; a < u; ++a) {
						n[a] = i[a]
						o[i.charCodeAt(a)] = a
					}
					o['-'.charCodeAt(0)] = 62
					o['_'.charCodeAt(0)] = 63

					function d(r) {
						const e = r.length
						if (e % 4 > 0) {
							throw new Error('Invalid string. Length must be a multiple of 4')
						}
						return r[e - 2] === '=' ? 2 : r[e - 1] === '=' ? 1 : 0
					}

					function c(r) {
						return (r.length * 3) / 4 - d(r)
					}

					function v(r) {
						let e, t, n, i, a
						const u = r.length
						i = d(r)
						a = new f((u * 3) / 4 - i)
						t = i > 0 ? u - 4 : u
						let c = 0
						for (e = 0; e < t; e += 4) {
							n =
								(o[r.charCodeAt(e)] << 18) |
								(o[r.charCodeAt(e + 1)] << 12) |
								(o[r.charCodeAt(e + 2)] << 6) |
								o[r.charCodeAt(e + 3)]
							a[c++] = (n >> 16) & 255
							a[c++] = (n >> 8) & 255
							a[c++] = n & 255
						}
						if (i === 2) {
							n = (o[r.charCodeAt(e)] << 2) | (o[r.charCodeAt(e + 1)] >> 4)
							a[c++] = n & 255
						} else {
							if (i === 1) {
								n = (o[r.charCodeAt(e)] << 10) | (o[r.charCodeAt(e + 1)] << 4) | (o[r.charCodeAt(e + 2)] >> 2)
								a[c++] = (n >> 8) & 255
								a[c++] = n & 255
							}
						}
						return a
					}

					function l(r) {
						return n[(r >> 18) & 63] + n[(r >> 12) & 63] + n[(r >> 6) & 63] + n[r & 63]
					}

					function h(r, e, t) {
						let n
						const o = []
						for (let f = e; f < t; f += 3) {
							n = (r[f] << 16) + (r[f + 1] << 8) + r[f + 2]
							o.push(l(n))
						}
						return o.join('')
					}

					function s(r) {
						let e
						const t = r.length
						const o = t % 3
						let f = ''
						const i = []
						const a = 16383
						let u = 0,
							d = t - o
						for (; u < d; u += a) {
							i.push(h(r, u, u + a > d ? d : u + a))
						}
						if (o === 1) {
							e = r[t - 1]
							f += n[e >> 2]
							f += n[(e << 4) & 63]
							f += '=='
						} else {
							if (o === 2) {
								e = (r[t - 2] << 8) + r[t - 1]
								f += n[e >> 10]
								f += n[(e >> 4) & 63]
								f += n[(e << 2) & 63]
								f += '='
							}
						}
						i.push(f)
						return i.join('')
					}
				},
				{}
			]
		},
		{},
		[]
	)('/')
})
